1 files changed, 137 insertions, 0 deletions

diff --git a/src/core/hid/emulated_devices.h b/src/core/hid/emulated_devices.h
new file mode 100644
index 000000000..6f728eff5
--- /dev/null
+++ b/src/core/hid/emulated_devices.h
@@ -0,0 +1,137 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <functional>
+#include <mutex>
+#include <unordered_map>
+
+#include "common/input.h"
+#include "common/param_package.h"
+#include "common/settings.h"
+#include "core/hid/hid_types.h"
+#include "core/hid/motion_input.h"
+
+namespace Core::HID {
+
+using KeyboardDevices =
+    std::array<std::unique_ptr<Input::InputDevice>, Settings::NativeKeyboard::NumKeyboardKeys>;
+using KeyboardModifierDevices =
+    std::array<std::unique_ptr<Input::InputDevice>, Settings::NativeKeyboard::NumKeyboardMods>;
+using MouseButtonDevices =
+    std::array<std::unique_ptr<Input::InputDevice>, Settings::NativeMouseButton::NumMouseButtons>;
+
+using MouseButtonParams =
+    std::array<Common::ParamPackage, Settings::NativeMouseButton::NumMouseButtons>;
+
+using KeyboardValues = std::array<Input::ButtonStatus, Settings::NativeKeyboard::NumKeyboardKeys>;
+using KeyboardModifierValues =
+    std::array<Input::ButtonStatus, Settings::NativeKeyboard::NumKeyboardMods>;
+using MouseButtonValues =
+    std::array<Input::ButtonStatus, Settings::NativeMouseButton::NumMouseButtons>;
+
+struct MousePosition {
+    s32 x;
+    s32 y;
+    s32 delta_wheel_x;
+    s32 delta_wheel_y;
+};
+
+struct DeviceStatus {
+    // Data from input_common
+    KeyboardValues keyboard_values{};
+    KeyboardModifierValues keyboard_moddifier_values{};
+    MouseButtonValues mouse_button_values{};
+
+    // Data for Nintendo devices
+    KeyboardKey keyboard_state{};
+    KeyboardModifier keyboard_moddifier_state{};
+    MouseButton mouse_button_state{};
+    MousePosition mouse_position_state{};
+};
+
+enum class DeviceTriggerType {
+    Keyboard,
+    KeyboardModdifier,
+    Mouse,
+};
+
+struct InterfaceUpdateCallback {
+    std::function<void(DeviceTriggerType)> on_change;
+};
+
+class EmulatedDevices {
+public:
+    /**
+     * TODO: Write description
+     *
+     * @param npad_id_type
+     */
+    explicit EmulatedDevices();
+    ~EmulatedDevices();
+
+    YUZU_NON_COPYABLE(EmulatedDevices);
+    YUZU_NON_MOVEABLE(EmulatedDevices);
+
+    void ReloadFromSettings();
+    void ReloadInput();
+    void UnloadInput();
+
+    void EnableConfiguration();
+    void DisableConfiguration();
+    bool IsConfiguring() const;
+    void SaveCurrentConfig();
+    void RestoreConfig();
+
+    std::vector<Common::ParamPackage> GetMappedDevices() const;
+
+    Common::ParamPackage GetMouseButtonParam(std::size_t index) const;
+
+    void SetButtonParam(std::size_t index, Common::ParamPackage param);
+
+    KeyboardValues GetKeyboardValues() const;
+    KeyboardModifierValues GetKeyboardModdifierValues() const;
+    MouseButtonValues GetMouseButtonsValues() const;
+
+    KeyboardKey GetKeyboard() const;
+    KeyboardModifier GetKeyboardModifier() const;
+    MouseButton GetMouseButtons() const;
+    MousePosition GetMousePosition() const;
+
+    int SetCallback(InterfaceUpdateCallback update_callback);
+    void DeleteCallback(int key);
+
+private:
+    /**
+     * Sets the status of a button. Applies toggle properties to the output.
+     *
+     * @param A CallbackStatus and a button index number
+     */
+    void SetKeyboardButton(Input::CallbackStatus callback, std::size_t index);
+    void SetKeyboardModifier(Input::CallbackStatus callback, std::size_t index);
+    void SetMouseButton(Input::CallbackStatus callback, std::size_t index);
+
+    /**
+     * Triggers a callback that something has changed
+     *
+     * @param Input type of the trigger
+     */
+    void TriggerOnChange(DeviceTriggerType type);
+
+    bool is_configuring{false};
+
+    MouseButtonParams mouse_button_params;
+
+    KeyboardDevices keyboard_devices;
+    KeyboardModifierDevices keyboard_modifier_devices;
+    MouseButtonDevices mouse_button_devices;
+
+    mutable std::mutex mutex;
+    std::unordered_map<int, InterfaceUpdateCallback> callback_list;
+    int last_callback_key = 0;
+    DeviceStatus device_status;
+};
+
+} // namespace Core::HID